Add device policy to disallow shutdown - ash UI modifications

chrome/browser/ui/ash/system_tray_delegate_common.cc

Index: chrome/browser/ui/ash/system_tray_delegate_common.cc
diff --git a/chrome/browser/ui/ash/system_tray_delegate_common.cc b/chrome/browser/ui/ash/system_tray_delegate_common.cc
index 3b434e49b7008e9dadec5237b27dd81f87424443..268827fea1d3ed43439f49af661ba448d12a41d9 100644
--- a/chrome/browser/ui/ash/system_tray_delegate_common.cc
+++ b/chrome/browser/ui/ash/system_tray_delegate_common.cc
@@ -268,6 +268,18 @@ void SystemTrayDelegateCommon::RemoveCustodianInfoTrayObserver(
     ash::CustodianInfoTrayObserver* observer) {
 }
 
+void SystemTrayDelegateCommon::AddShutdownPolicyObserver(
+    ash::ShutdownPolicyObserver* observer) {
+}
+
+void SystemTrayDelegateCommon::RemoveShutdownPolicyObserver(
+    ash::ShutdownPolicyObserver* observer) {
+}
+
+void SystemTrayDelegateCommon::ShouldRebootOnShutdown(
+    const ash::RebootOnShutdownCallback& callback) {
+}
+
 ash::SystemTrayNotifier* SystemTrayDelegateCommon::GetSystemTrayNotifier() {
   return ash::Shell::GetInstance()->system_tray_notifier();
 }